Answer:
Explanation:
Given that the volume of a piece of metal =
Mass of piece of metal= 500 g
Formula to calculate the density is given by :-
Then, the density of piece of metal is given by :-
[Rounded to the nearest two decimal places.]
Hence, its density of piece of metal=
Because it is unsaturated
You should wear eye Protection
Wear Gloves and wash hands after the investigation.
Lead bromide is toxic and dangerous for the environment.
Bromine is corrosive, toxic and very dangerous for the environment.
b. cannot be broken down further.
c. are all composed of carbon.
d. have no mass.
Answer:
B
Explanation:
Atoms are those particles which cannot be broken down further. But, later on the subatomic particles were discovered
John Dalton's Atomic Theory states that atoms are indivisible and cannot be broken down further. They combine to form molecules and are not all composed of carbon. Atoms do have mass.
John Dalton, an English chemist, is famous for his theory of atomic structure, also known as Dalton's Atomic Theory. According to this theory, atoms are the tiniest particles of matter which cannot be divided or broken down further into simpler substances by chemical means. Thus, the correct answer to the question would be (b) - atoms cannot be broken down further.
Atoms can combine in various proportions to form molecules, but they themselves do not contain molecules. Also, not all atoms are composed of carbon, there are many other elements such as hydrogen, oxygen, nitrogen, to name a few. Finally, atoms do possess mass, it is one of their fundamental properties.
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The difference between light reflection and refraction is simple. In reflection, the light ray striking the plane returns to the originating source or medium as the waves spring off the surface. in refraction, the waves go through the surface and it alters their speed and direction.
Reflection is the bouncing back of light when it strikes a smooth surface. Generally occurs on shinny surfaces that only allow rebounding of light without permitting penetration through it. In this process, light bounces back and returns back in the same direction.
Refraction is the bending of light rays when it travels from one medium to another. This occurs in transparent surfaces that allow bending of the ray to a different medium.
In this process, light changes path i.e travels from one medium to another.
To know more about Refraction, click on link.
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Answer:
stronger/ brighter, thats why red is first on the rainbow
Explanation:
Answer:
Longer.
Explanation:
The red end of the spectrum of light has longer wavelengths.